20世纪90年代我国的硫酸产量已达到1600万吨，这标志着我国硫酸工_爱下问搜题

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问题填空题

20世纪90年代我国的硫酸产量已达到1600万吨，这标志着我国硫酸工业取得飞速发展．工业生产硫酸的主要流程为：①煅烧黄铁矿4FeS₂+11O₂

高温

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2Fe₂O₃+8SO₂；②SO₂转化为SO₃；③用浓H₂SO₄吸收SO₃

请回答相关问题：

（1）如何利用流程①中形成的固体剩余物：______．

（2）SO₂是一种酸性氧化物，具有与CO₂相似的化学性质．生产中会有部分SO₂随尾气排入大气，造成环境污染．有人设计用熟石灰吸收尾气中的SO₂，请写出此反应的化学方程式______．

（3）第②步反应是一个化合反应，请判断实现此反应的另一反应物是______．

（4）将SO₂通入氯气的水溶液至恰好完全反应，生成两种常见的酸，请完成下列化学方程式：______．

答案

（1）氧化铁是炼铁的一种原料．故填：作为炼铁原料．

（2）氢氧化钙和二氧化硫反应生成亚硫酸钙和水，化学方程式为：SO₂+Ca（OH）₂═CaSO₃↓+H₂O

（3）二氧化硫和氧气反应能生成三氧化硫．故填：O₂

二氧化硫通入氯气的水溶液中反应生成盐酸和硫酸，化学方程式为：Cl₂+SO₂+2H₂O═2HCl+H₂SO₄

完形填空

One day my 5-year-old daughter, Mini, ran to the window crying: “A Cabuliwallah! A Cabuliwallah（从喀布尔来的水果商贩）!” In the street below was a Cbuliwallah,1 slowly along. Mini called him loudly but when he looked at her，she ran away, 2 . Shortly after this, the two became friends. They started to 3 together, laughing and talking. Mini’s new friend would give her sweets and nuts, 4 the little money he had on her.The Cabuliwallah, called Rahmum, would joke: “Well, little one, when are you going to the father-in-law’s house?” Mini did not understand this and was 5 .
One morning, I heard noise in the street, and saw Rahmum being led 6 by the police. There were bloodstains on his clothes. I gathered that a neighbor had 7 Rahmum money for a shawl (披肩)but had falsely 8 having bought it, and that in the course of the quarrel Rahmum had struck him. On a charge of murderous attack, Rahmum was 9 to jail.
Time passed, and he was not remembered. Mini grew up and we were making 10 for her wedding. I was sitting in my study when someone entered. It was Rahmum, 11 from prison.12 recognizable now, he asked to see Mini and said that all those years ago she had 13 him of his own daughter in Kabul. It was his belief that Mini was still the same. He had 14 her running to him calling “Cabuliwallah!”. He had imagined that they would laugh and talk together. In fact, he had brought her,15 in paper, a few nuts and grapes. The two were 16 but Mini had grown up. She now understood the meaning of the word “father-in-law,” and when he made this joke once more she was 17 in the face at the question. He could not revive(还原) their old friendship.
When Rahmum left, I gave him a bank note, saying:“Go back to your own daughter, and 18 the happiness of your meeting bring good fortune to my child! ”
Having made this present, I had to 19 the electric lights and the military band I had 20 for the wedding and the ladies in the house were disappointed. But to me the wedding feast was all the brighter for the thought that in a distant land a long-lost father met again with his child.

D．disappointed

A．appointments

D．arrangements

A．Immediately

名词解释

头寸调拨